Trotman, Kathleen M.
McGraw-Hill , 1973
Buku Teks
Houghton Mifflin , 1993
Buku Referensi
Boston: Houghton: 1993,
Buku Referensi
Stroman, James, author
[American Management Association;, ], 2012
eBooks
Gita Lastika, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2013
UI - Skripsi (Membership)